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Abstract
The shape memory effect (SME) and superelasticity (SE) behavior of homogenized Co35Ni35Al30 single crystals were systematically characterized along the [100], [110] and [111] orientations under compression. The shape memory behavior of CoNiAl was found to be highly orientation and stress/temperature dependent. Maximum compressive recoverable strains were 3.98 % in [110], 3 % in [100] and 0.30 % in [111] orientations, respectively. The Co35Ni35Al30 demonstrated a very high superelastic temperature window of more than 350 °C along the [100] and [110] orientations. Moreover, two-way shape memory effect with very low thermal hysteresis of about 6 °C was observed along the [110] orientation. The large decrease of recoverable strain and hysteresis with stress (or temperature) was mainly attributed to the difference of elastic moduli of transforming phases.
Document Type
Article
Publication Date
9-25-2017
Digital Object Identifier (DOI)
https://doi.org/10.1016/j.jallcom.2017.04.307
Funding Information
This work was supported in part by the KSEF-148-502-15-355 and NSF CMMI-1538665 programs.
Repository Citation
Li, Peizhen; Karaca, Haluk E.; and Chumlyakov, Yury I., "Orientation Dependent Compression Behavior of Co35Ni35Al30 Single Crystals" (2017). Mechanical Engineering Faculty Publications. 59.
https://uknowledge.uky.edu/me_facpub/59
Notes/Citation Information
Published in Journal of Alloys and Compounds, v. 718, p. 326-334.
© 2017 Elsevier B.V. All rights reserved.
This manuscript version is made available under the CC‐BY‐NC‐ND 4.0 license https://creativecommons.org/licenses/by-nc-nd/4.0/.
The document available for download is the author's post-peer-review final draft of the article.